Wavefunction collapse, quantum reality, EPR, Bell's Thm, and all that

A fundamental postulate of quantum mechanics states that a measurement of a quantum system causes the collapse of the wave function. This is in contrast to the smooth, continuous, deterministic time evolution of the wave function in between measurements, governed by the Schrodinger equation. The latter is similar to classical physics; the former is unique to quantum mechanics. (Note that many physicists object to the use of the word \collapse" in this context as misleading, usually because they don't like to think of it that way. They instead have some other way of referring to it, that usually requires far more words. I'll stick to \collapse".)